For what length of time do the effects of a concussion last?

Concussion: Depends on the severity of the concussion meaning that a light concussion without loss of consciousness the effects can be gone in days. In a more severe concussion the headaches and neck pain and other symptoms can last for months.

Depends: The effects of concussions can vary and be unpredictable. It depends on the severity of the injury. The best thing is to give your brain complete rest. The more stain you place on your brain while it is attempting to heal, the more likely it is to slow down the healing process.

Several weeks: The effects of concussion, meaning the symptoms may last for several weeks. Generally, the symptoms (may include but are not limited to: headache, dizziness, slowed mentation, ) abate by about 6 weeks. If they don't go away, you should have your primary care physician check it out.